|
| TABLE 6 | |||||||||
| RAW MATERIALS USED IN PRODUCING CLINKER AND CEMENT IN THE UNITED STATES1, 2 | |||||||||
| (Thousand metric tons) | |||||||||
| 2004 | 2005 | ||||||||
| Raw materials | Clinker | Cement3 | Clinker | Cement3 | |||||
| Calcareous: | |||||||||
| Limestone (includes aragonite, marble, chalk, coral) | 113,000 | r | 1,810 | 114,000 | 2,230 | ||||
| Cement rock (includes marl) | 12,700 | 2 | 11,300 | 2 | |||||
| Cement kiln dust (CKD)4 | 333 | 165 | 334 | 414 | |||||
| Lime5 | 24 | 29 | 9 | 30 | |||||
| Other | 23 | 19 | 26 | 21 | |||||
| Aluminous: | |||||||||
| Clay | 4,630 | r | -- | 4,790 | -- | ||||
| Shale | 3,700 | 29 | 3,780 | 30 | |||||
| Other6 | 661 | -- | 721 | -- | |||||
| Ferrous, iron ore, pyrites, millscale, other | 1,330 | r | -- | 1,553 | -- | ||||
| Siliceous: | -- | -- | |||||||
| Sand and calcium silicate | 3,150 | -- | 3,010 | -- | |||||
| Sandstone, quartzite, soils, other | 878 | 6 | 950 | -- | |||||
| Fly ash | 2,890 | 77 | 2,950 | 153 | |||||
| Other ash, including bottom ash | 1,050 | -- | 1,210 | -- | |||||
| Granulated blast furnace slag7 | 104 | 345 | 144 | 521 | |||||
| Other blast furnace slag | 189 | -- | 255 | -- | |||||
| Steel slag | 401 | -- | 525 | -- | |||||
| Other slags | 53 | -- | 58 | 2 | |||||
| Natural rock pozzolans8 | -- | 6 | -- | 8 | |||||
| Other pozzolans9 | 114 | 19 | 222 | 62 | |||||
| Other: | |||||||||
| Gypsum and anhydrite | -- | 5,200 | r | -- | 5,370 | ||||
| Other, n.e.c.10 | 106 | 98 | 84 | 108 | |||||
| Total11 | 146,000 | r | 7,810 | r | 146,000 | 8,940 | |||
| Clinker, imported, raw materials equivalent11 | -- | 4,400 | r | -- | 4,750 | ||||
| Grand total12 | 146,000 | r | 12,200 | r | 146,000 | 13,700 | |||
| rRevised.� -- Zero. | |||||||||
| 1Nonfuel raw materials. Excludes Puerto Rico. | |||||||||
| 2Data have been rounded to three significant digits to reflect inherent reporting accuracy and the incorporation | |||||||||
| of estimates for some facilities. | |||||||||
| 3Includes portland, blended, and masonry cements. | |||||||||
| 4Data are underreported. | |||||||||
| 5Data are probably underreported, especially regarding incorporation within masonry cements. | |||||||||
| 6Includes alumina, aluminum dross, bauxite, catalysts, staurolite, and other materials. | |||||||||
| 7Includes both ground (GGBFS) and unground material. | |||||||||
| 8Includes pozzolana and burned clays and shales except where reported directly as clay or shale. | |||||||||
| 9Includes diatomite, silica fume, other microcrystalline silica, and other pozzolans, whether or not used as such. | |||||||||
| 10Not elsewhere classified. | |||||||||
| 11Converted as the weight of foreign clinker consumed times 1.7. | |||||||||
| 12Data may not add to totals shown because of independent rounding. | |||||||||
Source: United States Geological Survey Mineral Resources Program